Name: Measurement of ${}_{\Lambda}^{3}\mathrm{H}$ production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
Creator: ALICE Collaboration
Published: 2024

Abstract (data abstract)

The first measurement of $_{\Lambda}^{3}\mathrm{H}$ and $^3_ {\overline{\Lambda}}\overline{\mathrm{H}}$ differential production with respect to transverse momentum and centrality in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV is presented. The $_{\Lambda}^{3}\mathrm{H}$ has been reconstructed via its two-charged-body decay channel, i.e., $_{\Lambda}^{3}\mathrm{H} \rightarrow {}^{3}\mathrm{He} + \pi^{-}$. A Blast-Wave model fit of the $p_{\rm T}$-differential spectra of all nuclear species measured by the ALICE collaboration suggests that the $_{\Lambda}^{3}\mathrm{H}$ kinetic freeze-out surface is consistent with that of other nuclei. The ratio between the integrated yields of $_{\Lambda}^{3}\mathrm{H}$ and $^3\mathrm{He}$ is compared to predictions from the statistical hadronisation model and the coalescence model, with the latter being favoured by the presented measurements.

(Anti)hypertriton spectrum in 0-10% V0M centrality class

Data from Figure 2 (left).

10.17182/hepdata.155083.v1/t1

Transverse momentum distributions of (anti)hypertriton in 0-10% V0M centrality class
(Anti)hypertriton spectrum in 10-30% V0M centrality class

Data from Figure 2 (middle).

10.17182/hepdata.155083.v1/t2

Transverse momentum distributions of (anti)hypertriton in 10-30% V0M centrality class
(Anti)hypertriton spectrum in 30-50% V0M centrality class

Data from Figure 2 (right).

10.17182/hepdata.155083.v1/t3

Transverse momentum distributions of (anti)hypertriton in 30-50% V0M centrality class
Hypertriton production yield

Data from Table 1

10.17182/hepdata.155083.v1/t4

Integrated (${}_{\Lambda}^{3}\mathrm{H} + {}^3_ {\overline{\Lambda}}\overline{\mathrm{H}}$)/2 yields in different V0M centrality classes
Hypertriton over He3 ratio as a function of multiplicity

Data from Figure 3.

10.17182/hepdata.155083.v1/t5

Hypertriton over He3 ratio as a function of multiplicity
Hypertriton over He3 ratio as a function of pT in 0-10%

Data from Figure 4 (left).

10.17182/hepdata.155083.v1/t6

Hypertriton over He3 ratio as a function of $p_{T}$ in 0-10% V0M centrality class
Hypertriton over He3 ratio as a function of pT in 10-30%

Data from Figure 4 (middle).

10.17182/hepdata.155083.v1/t7

Hypertriton over He3 ratio as a function of $p_{T}$ in 10-30% V0M centrality class
Hypertriton over He3 ratio as a function of pT in 30-50%

Data from Figure 4 (right).

10.17182/hepdata.155083.v1/t8

Hypertriton over He3 ratio as a function of $p_{T}$ in 30-50% V0M centrality class

(Anti)hypertriton spectrum in 0-10% V0M centrality class

(Anti)hypertriton spectrum in 10-30% V0M centrality class

(Anti)hypertriton spectrum in 30-50% V0M centrality class

Hypertriton production yield

Hypertriton over He3 ratio as a function of multiplicity

Hypertriton over He3 ratio as a function of pT in 0-10%

Hypertriton over He3 ratio as a function of pT in 10-30%

Hypertriton over He3 ratio as a function of pT in 30-50%

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